title: Epileptic cases of late onset with the diffuse slow spike-wave.
abstract: Twenty-two cases with the diffuse slow spike-wave, whose onset of clinical symptoms was at the age of seven or later, were examined. Half of them presented symptoms pertinent to the Lennox-Gastaut syndrome. The other half were cases of absence, psychomotor seizure or grand mal. The former group was distinguished from the latter in that it had worse prognoses concerning the seizure and intelligence, and discussions were held to see if it corresponds to the "Lennox-Gastaut syndrome of late onset" (Lipinski). Atypical absence and atonic seizure were the commonest symptoms in this group, and they, preceded by other types of seizures such as grand mal, developed mostly in adolescence, and their appearance was closely followed by that of the slow spike-wave on the EEG.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D004569:Electroencephalography; D004827:Epilepsy / Q000503:physiopathology*; D004832:Epilepsy, Absence / Q000503:physiopathology; D005260:Female; D006801:Humans; D007360:Intelligence; D008297:Male; D008875:Middle Aged; D011379:Prognosis